This is still a very enjoyable series, not far from season 1, I'm rating it as almost as good as Rome and equally as good as the best seasons of Spartacus (i.e the Andy Whitman seasons), but I do have to note it's become disappointingly repetitive in season 2 - we just go through a bit too many rehashes of the same pattern of "Livia gets some threat or obstacle to her plans -> Livia paces around furiously, swears like Geralt of Rivia a few times and thinks real hard -> Livia comes up with some brilliant solution, usually involving killing someone, allies help put that into practice and poof, everything is fine again".
I mean even if this is exactly what the documents show her life was like, the job of adaptation writers is to make it a bit more interesting than that, and I think most viewers are ready to accept deviations from the real history if those are put to good use keeping the story more engaging.